.tree {
  min-height:20px;
  padding:19px;
  margin-bottom:20px;
  background-color:#fbfbfb;
  border:1px solid #999;
  -webkit-border-radius:4px;
  -moz-border-radius:4px;
  border-radius:4px;
  -webkit-box-shadow:inset 0 1px 1px rgba(0, 0, 0, 0.05);
  -moz-box-shadow:inset 0 1px 1px rgba(0, 0, 0, 0.05);
  box-shadow:inset 0 1px 1px rgba(0, 0, 0, 0.05)
}
.well {
  min-height: 20px;
  padding: 19px;
  margin-bottom: 20px;
  background-color: #f5f5f5;
  border: 1px solid #e3e3e3;
  border-radius: 4px;
  -webkit-box-shadow: inset 0 1px 1px rgba(0,0,0,0.05);
  box-shadow: inset 0 1px 1px rgba(0,0,0,0.05);
}
ul {
  display: block;
  margin-inline-start: 0px;
  margin-inline-end: 0px;
  padding-inline-start: 40px;
}
* {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}
.tree li {
  list-style-type:none;
  margin:0;
  padding:10px 5px 0 5px;
  position:relative
}
.tree li::before, .tree li::after {
  content:'';
  left:-20px;
  position:absolute;
  right:auto
}
.tree li::before {
  border-left:1px solid #999;
  bottom:50px;
  height:100%;
  top:0;
  width:1px
}
.tree li::after {
  border-top:1px solid #999;
  height:20px;
  top:25px;
  width:25px
}
.tree li span {
  -moz-border-radius:5px;
  -webkit-border-radius:5px;
  border:1px solid #999;
  border-radius:5px;
  display:inline-block;
  padding:3px 8px;
  text-decoration:none
}
.tree li.parent_li>span {
  cursor:pointer
}
.tree>ul>li::before, .tree>ul>li::after {
  border:0
}
.tree li:last-child::before {
  height:30px
}
.tree li.parent_li>span:hover, .tree li.parent_li>span:hover+ul li span {
  background:#eee;
  border:1px solid #94a0b4;
  color:#000
}